package cmd

import (
	"os"
	"path/filepath"

	"github.com/pterodactyl/wings/config"
)

// We've gone through a couple of iterations of where the configuration is stored. This
// helpful little function will look through the three areas it might have ended up, and
// return it.
//
// We only run this if the configuration flag for the instance is not actually passed in
// via the command line. Once found, the configuration is moved into the expected default
// location. Only errors are returned from this function, you can safely assume that after
// running this the configuration can be found in the correct default location.
func RelocateConfiguration() error {
	var match string
	check := []string{
		config.DefaultLocation,
		"/var/lib/pterodactyl/config.yml",
		"/etc/wings/config.yml",
	}

	// Loop over all of the configuration paths, and return which one we found, if
	// any.
	for _, p := range check {
		if s, err := os.Stat(p); err != nil {
			if !os.IsNotExist(err) {
				return err
			}
		} else if !s.IsDir() {
			match = p
			break
		}
	}

	// Just return a generic not exist error at this point if we didn't have a match, this
	// will allow the caller to handle displaying a more friendly error to the user. If we
	// did match in the default location, go ahead and return successfully.
	if match == "" {
		return os.ErrNotExist
	} else if match == config.DefaultLocation {
		return nil
	}

	// The rest of this function simply creates the new default location and moves the
	// old configuration file over to the new location, then sets the permissions on the
	// file correctly so that only the user running this process can read it.
	p, _ := filepath.Split(config.DefaultLocation)
	if err := os.MkdirAll(p, 0755); err != nil {
		return err
	}

	if err := os.Rename(match, config.DefaultLocation); err != nil {
		return err
	}

	return os.Chmod(config.DefaultLocation, 0600)
}